EP1188720A1 - Installation for the separation of grease and water in sewage - Google Patents

Installation for the separation of grease and water in sewage Download PDF

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Publication number
EP1188720A1
EP1188720A1 EP00120355A EP00120355A EP1188720A1 EP 1188720 A1 EP1188720 A1 EP 1188720A1 EP 00120355 A EP00120355 A EP 00120355A EP 00120355 A EP00120355 A EP 00120355A EP 1188720 A1 EP1188720 A1 EP 1188720A1
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Prior art keywords
fat
waste water
wastewater
grease
ozone
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German (de)
French (fr)
Inventor
Hans-Jürgen Diehl
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Diddens Wilfried
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Diddens Wilfried
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Priority to EP00120355A priority Critical patent/EP1188720A1/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0205—Separation of non-miscible liquids by gas bubbles or moving solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/04—Breaking emulsions
    • B01D17/047—Breaking emulsions with separation aids
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/32—Hydrocarbons, e.g. oil
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/01—Density
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

Definitions

  • the invention relates to a method for wastewater treatment for the separation of fats and to increase the residual oxygen level in the wastewater.
  • Greasy waste water falls in large quantities, especially in catering establishments, butchers, Industrial kitchens (canteens) and in the meat processing industry.
  • the problem is the introduction of fats into the municipal sewage network, which is caused by the degradation products (Butyric acid) from fats and oils (animal and vegetable).
  • the limits these fats and oils in wastewater are subject to local regulations. So are at the corresponding companies are required to use a grease separator.
  • These usually exist from a sludge trap in which solid waste water components such as vegetable residues Pieces of meat and the like with a high specific weight after a certain dwell time sink to the bottom.
  • the wastewater gets out of the sludge trap via a Overflow (pipe connection) into a grease separator tank.
  • a sufficient reduction in the fat content in the wastewater is with gravity separation however not possible. This is where the emulsions between fat and detergent play in particular / Detergents play a big role. To comply with the local regulations for waste water discharge the fat content must not exceed 200 or 100 mg / l. It follows from this the need to apply additional wastewater treatment measures.
  • the system DE-G-91 07 621.1 on the market provides a grease separator system Separation of animal and vegetable fats from waste water, in which in the separation chamber a mechanical grease trap a ventilation device permanently installed and the bacteria are added. This is an enrichment of the wastewater reached in the fat separation room with oxygen and bacteria. In this way the Wastewater activates existing microorganisms, making it an enhanced biological Fat loss in wastewater is coming. However, this results in a number of Disadvantages.
  • the fat content in the wastewater is reduced, but the existing ones are Microorganisms proliferate, which undesirably leads to an additional burden of municipal wastewater.
  • the bacterial content in the wastewater - increased by Addition of microorganisms - like the fat content is subject to local regulations, which leads to the operation of biological wastewater treatment processes the traders may be prohibited.
  • DE-A-195 38 820 describes a wastewater treatment process for reducing heavy volatile lipophilic substances known.
  • the wastewater first passes through a mechanical one Grease separator and a subsequent fine filter before adding lime slurry and the lipophilic components in the wastewater are precipitated.
  • the sedimented Lime sludge is then disposed of separately.
  • the disadvantage here is continuously necessary use of resources - lime.
  • by adding Lime suspension strongly influences the pH value of the wastewater. You may need one subsequent neutralization to comply with the pH limit for discharge into the sewage system to be able to. This requires the use of additional resources (acids).
  • the object of the invention of a wastewater treatment plant presented here is the task to create a process for wastewater treatment with which the content is lipophilic Substances can be reduced effectively and quickly.
  • the process should be simple and be inexpensive to use without the use of operating materials (claim 10).
  • the task is solved by a process for the treatment of fats in emulsified waste water, at which ozone is introduced into the wastewater in a reactor. Through the Oxidation of the emulsified waste water breaks up the emulsion and removes the fat from the Water separated and deposited on the surface stably (claim 1).
  • Ozone is a particularly strong oxidizing agent. This will at Wastewater treatment has a biocidal effect. The microorganisms present in large numbers (anaerobic) are killed; the wastewater is subjected to disinfection.
  • ozone Treatment with ozone chemically degrades the fats in the wastewater. fatty acid chains are split up (ozonolysis), producing aldehydes and ketones. Ultimately the fatty acid components are converted to carbon dioxide and water by oxidation.
  • Another advantage results from the fact that volatile compounds (sulfur-hydrogen) responsible for odor formation are attacked and oxidized by ozone.
  • An advantageous embodiment of the method results (claims 2 and 3) in that the wastewater passes through a sludge trap and a fat separator before treatment with ozone; in this way, the water is already freed from coarse impurities and solids, which if possible do not deal with the Ozone should come into contact. After the ozone treatment in the reactor, the remaining water is returned to the sludge trap and then to the fat separator. This creates a cycle that ensures continuous treatment of the wastewater. The water is thus repeatedly gassed with ozone, which ensures particularly effective fat reduction.
  • the partially forming fatty foam (claim 7) is fed to the fat separator via the sludge trap, where it is deposited on the surface with the remaining fat. The hard fat layer on the surface prevents the overlaid foam from releasing its fat into the water.
  • the reactor is the heart of the plant.
  • the design of this reactor causes 80% of the system to function.
  • the reactor (1) is designed as a pressure vessel and is gas-tight. Gas tightness is necessary because the strongly oxidizing ozone is toxic and must not be inhaled by the operating personnel of the system.
  • the reactor (1) is made of stainless steel and is designed so that the wastewater is fed in via a contact tube (1a) (stainless steel tube), which is attached in the middle of the reactor.
  • the ozone is bubbled out in the contact tube (III) and brought to the waste water. The desired oxidation occurs here.
  • the wastewater treatment plant is a plant, which in its conception is a Retrofitting to all existing grease separators possible.
  • the ozone is generated by means of a compressor (7b), air dryer (I) and an ozonizer (II) from atmospheric air (claim 8).
  • a commercially available ozonizer (7a) is used to generate ozone, which generates ozone from atmospheric oxygen by spark discharge.
  • the wastewater passes through the reactor several times. This wastewater throughput is caused by a centrifugal pump (8) with a low energy consumption (claims 6 to 8).
  • the pump (claim 8) rolls the wastewater from the grease separating chamber via pipes (8a) to the reactor and back into the sludge trap. This results in a closed wastewater cycle. Furthermore, this cycle also effects a further gravity separation, since the surface contact is expanded (claim 9).
  • the invention relates to a method and a plant for the treatment of fats in waste water (Grease traps). Ozone is introduced into the fatty wastewater using compressed air, so that fat is broken down by oxidation (claims 6 and 7).
  • the wastewater treatment plant according to the invention effectively reduces the proportion of lipophilic components in the wastewater.
  • the COD value is positively influenced and thus the oxygen content in the Wastewater increased. It is of great importance that existing gravity-dependent Grease separating systems can be retrofitted without any problems.
  • the ozonizer can be carried out without the use of operating materials.

Abstract

A process for treating fatty emulsions in waste water comprises: (1) blowing in ozone; and (2) cracking the emulsions. Independent claims are also included for the following: (i) An apparatus for the above process comprising a sediment trap and a gravity separator together with a reactor with a gasifier; (ii) The use of an ozone generator for the cracking of fatty emulsions in waste water

Description

Die Erfindung betrifft ein Verfahren zur Abwasserbehandlung für die Trennung von Fetten und zur Erhöhung des Restsauerstoffwertes im Abwasser.The invention relates to a method for wastewater treatment for the separation of fats and to increase the residual oxygen level in the wastewater.

Fetthaltige Abwässer fallen in größeren Mengen vor allem in Gastronomiebetrieben, Metzgereien, Großküchen (Kantinen) und in der fleischverarbeitenden Industrie an. Das Problem ist die Einleitung von Fetten in das kommunale Abwassemetz, welches durch die Abbauprodukte (Buttersäure) von Fetten und Ölen (tierisch wie pflanzlich) zerstört werden. Die Grenzwerte dieser Fette und Öle im Abwasser unterliegen den örtlichen Bestimmungen. So sind bei den entsprechenden Betrieben Fettabscheider vorgeschrieben. Diese bestehen üblicherweise aus einem Schlammfang, in welchem feste Abwasserbestandteile wie Gemüsereste, Fleischstückchen und ähnliches mit hohem spezifischen Gewicht nach einer gewissen Verweilzeit auf den Grund absinken. Aus dem Schlammfang gelangt das Abwasser über einen Überlauf (Rohrverbindung) in einen Fettabscheidebehälter. Hier setzen sich die Fettanteile, welche ein geringeres spezifisches Gewicht als Wasser haben, als Schwimmstoffe an der Oberfläche ab und können so vom restlichen Abwasser getrennt entsorgt werden. Derartige nach der Schwerkrafttrennung arbeitende Fettabscheideanlagen sind normiert nach der DIN 4040/E-DIN 4040-2.Greasy waste water falls in large quantities, especially in catering establishments, butchers, Industrial kitchens (canteens) and in the meat processing industry. The problem is the introduction of fats into the municipal sewage network, which is caused by the degradation products (Butyric acid) from fats and oils (animal and vegetable). The limits these fats and oils in wastewater are subject to local regulations. So are at the corresponding companies are required to use a grease separator. These usually exist from a sludge trap in which solid waste water components such as vegetable residues Pieces of meat and the like with a high specific weight after a certain dwell time sink to the bottom. The wastewater gets out of the sludge trap via a Overflow (pipe connection) into a grease separator tank. This is where the fat content settles, which have a lower specific weight than water than floating substances on the Surface and can be disposed of separately from the rest of the wastewater. Such grease separators, which operate according to gravity separation, are standardized according to DIN 4040 / E-DIN 4040-2.

Eine ausreichende Reduzierung des Fettanteils im Abwasser ist mit der Schwerkrafttrennung jedoch nicht möglich. Hier spielen besonders die Emulsionen zwischen Fett und Spülmitteln / Reinigungsmitteln eine große Rolle. Zur Einhaltung der örtlichen Vorschriften zur Abwassereinleitung darf der Fettgehalt nicht mehr als 200 bzw. 100 mg/l betragen. Hieraus ergibt sich die Notwendigkeit, zusätzliche Maßnahmen der Abwasseraufbereitung anzuwenden.A sufficient reduction in the fat content in the wastewater is with gravity separation however not possible. This is where the emulsions between fat and detergent play in particular / Detergents play a big role. To comply with the local regulations for waste water discharge the fat content must not exceed 200 or 100 mg / l. It follows from this the need to apply additional wastewater treatment measures.

Die auf dem Markt befindliche Anlage DE-G-91 07 621.1 stellt ein Fettabscheidesystem zur Abscheidung tierischer und pflanzlicher Fette aus Abwässem dar, bei welchem in der Abscheidekammer eines mechanischen Fettabscheiders eine Belüftungsvorrichtung fest eingebaut ist und der Bakterien zugesetzt werden. Damit wird eine Anreicherung des Abwassers im Fettabscheideraum mit Sauerstoff und Bakterien erreicht. Auf diese Weise werden die im Abwasser vorhandenen Mikroorganismen aktiviert, so dass es zu einem verstärkten biologischen Fettabbau im Abwasser kommt. Daraus ergeben sich allerdings eine Reihe von Nachteilen. Der Fettanteil im Abwasser wird zwar abgesenkt, dafür werden aber die vorhandenen Mikroorganismen stark vermehrt, was unerwünschterweise zu einer zusätzlichen Belastung der kommunalen Abwässer führt. Der Bakteriengehalt im Abwasser - erhöht durch Zusatz von Mikroorganismen - unterliegt ebenso wie der Fettgehalt örtlichen Vorschriften, was dazu führt, dass der Betrieb von biologisch arbeitenden Abwasserreinigungsverfahren den Gewerbetreibenden untersagt sein kann.The system DE-G-91 07 621.1 on the market provides a grease separator system Separation of animal and vegetable fats from waste water, in which in the separation chamber a mechanical grease trap a ventilation device permanently installed and the bacteria are added. This is an enrichment of the wastewater reached in the fat separation room with oxygen and bacteria. In this way the Wastewater activates existing microorganisms, making it an enhanced biological Fat loss in wastewater is coming. However, this results in a number of Disadvantages. The fat content in the wastewater is reduced, but the existing ones are Microorganisms proliferate, which undesirably leads to an additional burden of municipal wastewater. The bacterial content in the wastewater - increased by Addition of microorganisms - like the fat content, is subject to local regulations, which leads to the operation of biological wastewater treatment processes the traders may be prohibited.

Aus der DE-A-195 38 820 ist ein Abwasserreinigungsverfahren zur Reduzierung von schwer flüchtigen lipophilen Stoffen bekannt. Dabei durchläuft das Abwasser zunächst einen mechanischen Fettabscheider und einen nachfolgenden Feinfilter, bevor Kalksuspension zugesetzt wird und es zur Ausfällung der lipophilen Anteile im Abwasser kommt. Der sedimentierte Kalkschlamm wird dann einer getrennten Entsorgung zugeführt. Nachteilig ist hierbei der kontinuierlich notwendige Betriebsmitteleinsatz - Kalk-. Außerdem wird durch den Zusatz von Kalksuspension der pH-Wert des Abwassers stark beeinflusst. Gegebenfalls bedarf es einer nachfolgenden Neutralisation, um den pH-Grenzwert für die Abgabe in die Kanalisation einhalten zu können. Dies erfordert den Einsatz weiterer Betriebsmittel (Säuren).DE-A-195 38 820 describes a wastewater treatment process for reducing heavy volatile lipophilic substances known. The wastewater first passes through a mechanical one Grease separator and a subsequent fine filter before adding lime slurry and the lipophilic components in the wastewater are precipitated. The sedimented Lime sludge is then disposed of separately. The disadvantage here is continuously necessary use of resources - lime. In addition, by adding Lime suspension strongly influences the pH value of the wastewater. You may need one subsequent neutralization to comply with the pH limit for discharge into the sewage system to be able to. This requires the use of additional resources (acids).

Der hier vorgestellten Erfindung einer Abwasserbehandlungsanlage liegt die Aufgabe zugrunde, ein Verfahren zur Abwasserbehandlung zu schaffen, mit welchem der Gehalt lipophiler Stoffe wirksam und schnell reduziert werden kann. Das Verfahren soll dabei einfach und kostengünstig ohne den Einsatz von Betriebsstoffen anzuwenden sein (Anspruch 10).The object of the invention of a wastewater treatment plant presented here is the task to create a process for wastewater treatment with which the content is lipophilic Substances can be reduced effectively and quickly. The process should be simple and be inexpensive to use without the use of operating materials (claim 10).

Gelöst wird die Aufgabe durch ein Verfahren zur Behandlung von Fetten in emulgierten Abwässem, bei welchem Ozon in einem Reaktor in das Abwasser eingebracht wird. Durch die Oxidation des emulgierten Abwassers wird die Emulsion aufgebrochen und das Fett vom Wasser getrennt und stabil an die Oberfläche abgeschieden (Anspruch 1).The task is solved by a process for the treatment of fats in emulsified waste water, at which ozone is introduced into the wastewater in a reactor. Through the Oxidation of the emulsified waste water breaks up the emulsion and removes the fat from the Water separated and deposited on the surface stably (claim 1).

Durch dieses Verfahren ergeben sich folgende Vorteile:
1. Durch die Einperlung der Ozonluftmischung im Reaktor kommt es zu einer Blasen- / Fettverbindung, welche zu einer Oberflächenschicht - Abtrennschicht - im Rücklaufbehälter (Schlammfang) führt (Anspruch 2).This procedure has the following advantages:
1. The bubbling in of the ozone air mixture in the reactor leads to a bubble / fat connection, which leads to a surface layer - separation layer - in the return tank (sludge trap) (claim 2).

Bei Ozon handelt es sich um ein besonders starkes Oxidationsmittel. Hierdurch wird bei der Abwasserbehandlung eine biozide Wirkung erzielt. Die in großer Zahl vorhandenen Mikroorganismen (anaerob) werden abgetötet; das Abwasser wird einer Desinfektion unterzogen.Ozone is a particularly strong oxidizing agent. This will at Wastewater treatment has a biocidal effect. The microorganisms present in large numbers (anaerobic) are killed; the wastewater is subjected to disinfection.

Durch die Behandlung mit Ozon werden die Fette im Abwasser chemisch abgebaut. Fettsäureketten werden aufgespalten (Ozonolyse), wobei Aldehyde und Ketone entstehen. Letztlich werden die Fettsäurebestandteile durch Oxidation zu Kohlendioxid und Wasser umgesetzt. Treatment with ozone chemically degrades the fats in the wastewater. fatty acid chains are split up (ozonolysis), producing aldehydes and ketones. Ultimately the fatty acid components are converted to carbon dioxide and water by oxidation.

Ein weiterer Vorteil ergibt sich daraus, dass für die Geruchsbildung verantwortliche, flüchtige Verbindungen (Schwefel-Wasserstoff) durch Ozon angegriffen und oxidiert werden.
Eine vorteilhafte Ausgestaltung des Verfahrens ergibt sich (Anspruch 2 und 3) dadurch, dass das Abwasser vor der Behandlung mit Ozon einen Schlammfang und einen Fettabscheider teilweise durchläuft, das Wasser ist auf diese Weise bereits von groben Verunreinigungen und Feststoffen befreit, welche möglichst nicht mit dem Ozon in Kontakt kommen sollen. Nach der Ozonbehandlung im Reaktor wird das zurückgebliebene Wasser wieder in den Schlammfang und danach dem Fettabscheider zugeführt. So ergibt sich ein Kreislauf, der eine kontinuierliche Behandlung des Abwassers gewährleistet. Das Wasser wird somit wiederholt mit Ozon begast, was eine besonders effektive Fettreduzierung sicherstellt.
Der sich teilweise bildende fetthaltige Schaum (Anspruch 7) wird über den Schlammfang dem Fettabscheider zugeführt, wo er an der Oberfläche mit dem übrigen Fett abgeschieden wird. Die auf der Oberfläche befindliche harte Fettschicht verhindert, dass der übergelagerte Schaum wieder sein Fett an das Wasser abgibt.Another advantage results from the fact that volatile compounds (sulfur-hydrogen) responsible for odor formation are attacked and oxidized by ozone.
An advantageous embodiment of the method results (claims 2 and 3) in that the wastewater passes through a sludge trap and a fat separator before treatment with ozone; in this way, the water is already freed from coarse impurities and solids, which if possible do not deal with the Ozone should come into contact. After the ozone treatment in the reactor, the remaining water is returned to the sludge trap and then to the fat separator. This creates a cycle that ensures continuous treatment of the wastewater. The water is thus repeatedly gassed with ozone, which ensures particularly effective fat reduction.
The partially forming fatty foam (claim 7) is fed to the fat separator via the sludge trap, where it is deposited on the surface with the remaining fat. The hard fat layer on the surface prevents the overlaid foam from releasing its fat into the water.

Die zur Durchführung des Verfahrens vorgesehene Anlage besteht aus:

  • 1. dem Schlammfang und einem Fettabscheider
  • 2. einer Ozonerzeugungsanlage
  • 3. einem Pumpensystem
  • 4. einem Reaktor für die Begasung des Abwassers.
    • The system provided for carrying out the process consists of:
  • 1. the sludge trap and a grease separator
  • 2. an ozone generation plant
  • 3. a pump system
  • 4. a reactor for gassing the wastewater.

    • Der Reaktor ist das Herzstück der Anlage. Die Ausgestaltung dieses Reaktors bewirkt zu 80% die Funktion des Systems.
    Der Reaktor (1) ist als Druckkessel ausgelegt und gasdicht. Die Gasdichtigkeit ist deshalb notwendig, da das stark oxidierende Ozon toxisch ist und nicht vom Bedienungspersonal der Anlage eingeatmet werden darf. Der Reaktor (1) besteht aus Edelstahl und ist so ausgelegt, dass das Abwasser über eine Kontaktröhre (1a) (Edelstahlrohr), welche in der Mitte des Reaktors angebracht ist, eingespeist wird. In der Kontaktröhre (III) wird das Ozon ausgeperlt und an das Abwasser herangeführt. Hier kommt es zu der gewünschten Oxidation.    The reactor is the heart of the plant. The design of this reactor causes 80% of the system to function.
    The reactor (1) is designed as a pressure vessel and is gas-tight. Gas tightness is necessary because the strongly oxidizing ozone is toxic and must not be inhaled by the operating personnel of the system. The reactor (1) is made of stainless steel and is designed so that the wastewater is fed in via a contact tube (1a) (stainless steel tube), which is attached in the middle of the reactor. The ozone is bubbled out in the contact tube (III) and brought to the waste water. The desired oxidation occurs here.

    Die Abwasserbehandlungsanlage ist eine Anlage, welche in ihrer Konzeptionierung eine Nachrüstung an allen vorhandenen Fettabscheideanlagen ermöglicht. The wastewater treatment plant is a plant, which in its conception is a Retrofitting to all existing grease separators possible.

    Laut Aufgabenstellung soll das patentierte Verfahren ohne Zusatz von Betriebsstoffen durchführbar sein. Es wird das Ozon mittels eines Kompressors (7b), Lufttrockners (I) und eines Ozonisators (II) aus Atmosphärenluft erzeugt (Anspruch 8).
    Für die Ozonerzeugung wird ein handelsüblicher Ozonisator (7a) eingesetzt, welcher durch Funkenentladung aus Luftsauerstoff Ozon erzeugt.
    Um eine optimale Wirkung des Ozons auf das fetthaltige Abwasser zu gewährleisten, durchläuft das Abwasser den Reaktor mehrfach. Diesen Abwasserdurchsatz bewirkt eine Kreiselpumpe (8) mit einer geringen Energieaufnahme (Anspruch 6 bis 8).
    Die Pumpe (Anspruch 8) wälzt das Abwasser vom Fettabscheideraum über Rohrleitungen (8a) zum Reaktor und wieder zurück in den Schlammfang.
    Auf diese Weise ergibt sich ein geschlossener Abwasserkreislauf.
    Weiterhin bewirkt dieser Kreislauf auch eine weiterführende Schwerkraftabscheidung, da die Oberflächenkontaktierung erweitert wird (Anspruch 9).    According to the task, the patented process should be feasible without the addition of operating materials. The ozone is generated by means of a compressor (7b), air dryer (I) and an ozonizer (II) from atmospheric air (claim 8).
    A commercially available ozonizer (7a) is used to generate ozone, which generates ozone from atmospheric oxygen by spark discharge.
    In order to ensure an optimal effect of the ozone on the fatty wastewater, the wastewater passes through the reactor several times. This wastewater throughput is caused by a centrifugal pump (8) with a low energy consumption (claims 6 to 8).
    The pump (claim 8) rolls the wastewater from the grease separating chamber via pipes (8a) to the reactor and back into the sludge trap.
    This results in a closed wastewater cycle.
    Furthermore, this cycle also effects a further gravity separation, since the surface contact is expanded (claim 9).

    Ein Ausführungsbeispiel der Erfindung wird im Folgenden anhand der Zeichnungen näher erläutert.

    Figur 1:
    zeigt das Fließschema
    Figur 2:
    zeigt Draufsicht der Realisierungsmöglichkeit
    Figur 3:
    zeigt die Ansichten
    An embodiment of the invention is explained below with reference to the drawings.
    Figure 1:
    shows the flow diagram
    Figure 2:
    shows top view of the implementation possibility
    Figure 3:
    shows the views

    Zusammenfassung:Summary:

    Die Erfindung betrifft ein Verfahren und eine Anlage zur Behandlung von Fetten in Abwässern (Fettabscheider). In das fetthaltige Abwasser wird Ozon mittels Pressluft eingebracht, so dass Fett durch Oxidation abgebaut wird (Anspruch 6 und 7). Die erfindungsgemäße Abwasserbehandlungsanlage reduziert wirksam den Anteil von lipophilen Bestandteilen im Abwasser. Gleichzeitig wird der CSB-Wert positiv beeinflusst und somit der Sauerstoffanteil im Abwasser erhöht. Dabei ist von großer Bedeutung, dass bereits bestehende schwerkraftabhängige Fettabscheidesysteme problemlos nachzurüsten sind. Durch die Verwendung eines Ozonisators wird das Verfahren ohne Einsatz von Betriebsstoffen durchführbar.The invention relates to a method and a plant for the treatment of fats in waste water (Grease traps). Ozone is introduced into the fatty wastewater using compressed air, so that fat is broken down by oxidation (claims 6 and 7). The wastewater treatment plant according to the invention effectively reduces the proportion of lipophilic components in the wastewater. At the same time, the COD value is positively influenced and thus the oxygen content in the Wastewater increased. It is of great importance that existing gravity-dependent Grease separating systems can be retrofitted without any problems. By using a The ozonizer can be carried out without the use of operating materials.

    Claims (10)

    Verfahren zur Behandlung von Fettemulgierungen in Abwässem, dadurch gekennzeichnet, dass Ozon in das Abwasser eingeblasen wird und die vorhandenen Emulgierungen gekräckt werden.Process for the treatment of fat emulsions in waste water, characterized in that ozone is blown into the waste water and the existing emulsions are cracked. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Abwasser zuvor einen Schlammfang und einen Schwerkraftfettabscheider durchläuft.A method according to claim 1, characterized in that the waste water previously passes through a sludge trap and a gravity grease separator. Verfahren nach mindestens einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass das behandelte Abwasser in einen Schlammfang oder in einen Schwerkraftfettabscheider geleitet wird.Method according to at least one of claims 1 and 2, characterized in that the treated waste water is passed into a sludge trap or into a gravity grease separator. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass der eventuell entstehende fetthaltige Schaum und die oxidierte Fettschlacke dem Schwerkraftfettabscheider zugeführt werden.A method according to claim 3, characterized in that the possibly occurring fatty foam and the oxidized fat slag are fed to the gravity fat separator. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die oxidierte Fettschlacke der im Schwerkraftfettabscheider oben schwimmenden Fettschicht zugeführt wird.A method according to claim 4, characterized in that the oxidized grease slag is fed to the grease layer floating at the top in the gravity grease separator. Anlage zur Durchführung des Verfahrens nach Anspruch 1 mit einem Schlammfang und einem Schwerkraftfettabscheider, dadurch gekennzeichnet, dass die Anlage einen Reaktor mit einer Begasungseinrichtung aufweist.Plant for performing the method according to claim 1 with a sludge trap and a gravity grease separator, characterized in that the plant has a reactor with a gassing device. Anlage nach mindestens einem der Ansprüche nach 6 und 7, dadurch gekennzeichnet, dass Ozon mittels eines Kompressors und eines Ozongenerators aus Umgebungsluft erzeugt wird.System according to at least one of claims 6 and 7, characterized in that ozone is generated from ambient air by means of a compressor and an ozone generator. Anlage nach mindestens einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass eine Umwälzpumpe vorgesehen ist, die das im Reaktor zurückgebliebene Wasser in den Schlammfang transportiert.Plant according to at least one of claims 6 to 8, characterized in that a circulation pump is provided which transports the water remaining in the reactor into the sludge trap. Verwendung eines Ozonisators zur Reduzierung von Fettemulsionen und Fett in Abwässem.Use of an ozonizer to reduce fat emulsions and fat in waste water. Verfahren ohne zusätzliche BetriebsstoffeProcess without additional operating materials
    EP00120355A 2000-09-16 2000-09-16 Installation for the separation of grease and water in sewage Withdrawn EP1188720A1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    EP00120355A EP1188720A1 (en) 2000-09-16 2000-09-16 Installation for the separation of grease and water in sewage

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP00120355A EP1188720A1 (en) 2000-09-16 2000-09-16 Installation for the separation of grease and water in sewage

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    EP1188720A1 true EP1188720A1 (en) 2002-03-20

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    CN113233705A (en) * 2021-05-18 2021-08-10 河北首朗新能源科技有限公司 Equipment and method for treating organic wastewater containing medium-long chain fatty acid

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    US5004537A (en) * 1989-12-19 1991-04-02 Brown James J Ozone water purification system
    US5053140A (en) * 1989-07-26 1991-10-01 American Water Purification, Inc. Process and apparatus for removing impurities from water used in food processing utilizing a mixture of ozone and air
    JPH11333478A (en) * 1998-05-26 1999-12-07 Kyowa Kikai Kk Method and apparatus for treating waste water by ozone

    Patent Citations (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US4790943A (en) * 1987-05-07 1988-12-13 Southeastern Water Conservation Systems, Inc. Renovation of used water from poultry processing plants
    DE3832209A1 (en) * 1987-11-27 1989-06-08 Bbc Brown Boveri & Cie Process for purifying surfactant-containing oil/water emulsions
    US5053140A (en) * 1989-07-26 1991-10-01 American Water Purification, Inc. Process and apparatus for removing impurities from water used in food processing utilizing a mixture of ozone and air
    US5004537A (en) * 1989-12-19 1991-04-02 Brown James J Ozone water purification system
    JPH11333478A (en) * 1998-05-26 1999-12-07 Kyowa Kikai Kk Method and apparatus for treating waste water by ozone

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    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN113233705A (en) * 2021-05-18 2021-08-10 河北首朗新能源科技有限公司 Equipment and method for treating organic wastewater containing medium-long chain fatty acid
    CN113233705B (en) * 2021-05-18 2024-03-08 河北首朗新能源科技有限公司 Organic wastewater treatment equipment and method containing medium-long chain fatty acid

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